I highly recommend the following, all Benchmades - not really a Spyderco fan, though I do have a few of theirs in my collection (but not in EDC rotation), so my recommendations are a little biased. I can recommend other brands (Boker, Buck, etc.), but you're already liking Benchmade and Spyderco, so...
586 Barrage mini - 2.91" blade, close enough to 3". Spring assisted. My primary EDC.
615 Mini Rukus - Discontinued, but feels awesome in-hand. Some say the best they ever made. 3.4" blade.
484 Nakamura - Also feels awesome in-hand. First Nakamura with Axis lock. 3.06" blade. Available in carbon fiber (484-1)
940 - One of the top selling Benchmades, for a reason.
Griptilian mini - several models to choose from. Also one of the top selling Benchmades. Good price.
OK, fine, a Spyderco you probably never heard of - the Dyad (C44). Discontinued, but you can find them in the classifieds, and fleabay. Two blades - one plain and one full serrated. Best of both worlds. I have a few in my collection, but don't EDC them. Also available in "Jr." and "micro" and with different scale configurations.
Good luck, and remember, you don't have to settle for only one! (says me, 95 knives later!)